This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A375744 #7 Sep 20 2024 06:43:03 %S A375744 39,63,71,79,87,95,111,119,127,135,143,151,156,159,167,175,183,191, %T A375744 199,207,215,223,231,239,247,252,255,263,271,279,284,287,295,303,311, %U A375744 316,319,327,335,343,348,351,359,367,375,380,383,391,399,407,415,423,431 %N A375744 Numbers that are the sum of 4 but no fewer nonzero squares and admit a representation with 4 distinct squares. %C A375744 Intersection of A004215 and A004433. %e A375744 39 is a term, since it requires 4 squares to be represented and admits the representation 39 = 5^2 + 3^2 + 2^2 + 1^2. %e A375744 30 is not a term, although it can be represented as a sum of 4 different squares 30 = 4^2+ 3^2 + 2^2 + 1^2 also admits a representation as a sum of 3 squares: 30 = 5^2 + 2^2 + 1^2. %e A375744 7 is not a term, since although it requires 4 squares to be represented as follows 7 = 2^2 + 1^2 + 1^2 + 1^2, it is noted that 1 is used on more than one occasion. %Y A375744 Cf. A004215, A004433. %K A375744 nonn %O A375744 1,1 %A A375744 _Gonzalo MartÃnez_, Aug 26 2024